Overview
4-tert-butylcatechol (CAS 98-29-3 ), commonly known as TBC or Synox TBC, is an industrial antioxidant and polymerization inhibitor used across polymer, monomer, and chemical manufacturing.
It prevents premature crosslinking and oxidative degradation during storage, transport, and processing of reactive chemical systems. This chemical is the inhibitor of choice for stabilizing vinyl monomers.
It is used for styrene, butadiene, and acrylates during bulk storage and pipeline transfer, where uninhibited polymerization would cause costly blockages and product loss in industrial systems.
In coatings and adhesive formulations, it extends shelf life by suppressing oxidative cure before application. Rubber and elastomer producers use it to control premature vulcanization and maintain processability.
At lower concentrations, it functions as an antioxidant in lubricant and metalworking fluid formulations. It protects base stocks from oxidative breakdown under high-temperature service conditions.
The product is supplied as a white to off-white crystalline solid, typically in flake or powder form. It is available in technical grade, which covers the majority of industrial inhibitor applications.
Bulk packaging in fiber drums and IBCs is standard, with smaller quantities available for laboratory and specialty use. This ensures safe handling and efficient transport for global chemical supply chains.
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Physical Properties
| Melting Point | 54.3 °C |
| Boiling Point | 285.1 °C @ Press: Atm pressure |
| Density | 1.049 |
| Flash Point | >230 °F |
| Appearance | white to cream flakes |
| Color | White to Light yellow to Light red |
| Odor | at 10.00?%?in?dipropylene glycol. phenolic |
| Form | powder to lump |
| Water Solubility | 0.2 g/100 mL (25 ºC) |
| Vapor Pressure | <1 hPa (25 °C) |
| Refractive Index | n 20/D 1.508 |
| Log P | 1.98 at 25℃ |
Safety & Handling
Danger GHS05 GHS06 GHS07 GHS09 GHS08 Hazard Statements H302 Harmful if swallowed H311 Toxic in contact with skin H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H317 May cause an allergic skin reaction H318 Causes serious eye damage H351 Suspected of causing cancer H400 Very toxic to aquatic life H411 Toxic to aquatic life with long lasting effects Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P333+P317 Get emergency medical help. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29072900 |
| UN Number | 2923 |
| ADR Class | 8 |
| Packing Group | III |
| WGK (Germany) | 2 |
Other Names
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Chemical Properties
- CAS Number
- 98-29-3
- EC Number
- 202-653-9
- Mol. Weight
- 166.22
- HS Code
- 29072900
- Category
- Flavors & Fragrances